was recommended that a separate seed-cotton storage house be maintained and 

 be provided with special cleaners which may be of use in removing weevils and 

 facilitating ginning. It is also recommended that in the gin house proper cleaner 

 feeders and cotton cleaners be used more extensively and that all trash be treated 

 so as to effectively destroy the weevils. 



CONTROL - DILUENTS 



1948 - Gaines, J. C., and R. L. Hanna. Comparison of diluents in insecticide mixtures 

 for cotton insect control. J. Econ. Ent. 41(5):81 1-812. 



Pyrophyllite and sulfur were used as diluents in mixtures with BHC, DDT, a 

 chlorinated camphene, and calcium arsenate. Benzene hexachloride-DDT mix- 

 tures, chlorinated camphene, and calcium arsenate mixtures were equally effec- 

 tive against the boll weevil and gave significantly better control than the diluents 

 alone. Pyrophyllite or sulphur did not affect the toxicity of these insecticides when 

 used against the boll weevil. Sulfur prevented red spider increases. 



The benzene hexachloride-DDT and the chlorinated camphene both gave 

 significantly better yields than calcium arsenate. The use of different diluents 

 did not affect the yields. 



CONTROL - FUMIGATION 



1905 - Hunter, W. D. Controlling the boll weevil in cotton seed and at ginneries. 

 U. S. D. A. Farmers' Bui. 209, 31 p., fig. 1. 



It was found that hydrocyanic-acid gas, when used at twice as great a 

 strength as required for the fumigation of grain, failed to kill the boll weevils 

 after 5 hrs. exposure at a depth of 6 to 10 inches in cottonseed. Similar results 

 were obtained when house flies were placed at depths of from 6 to 12 inches in 

 cottonseed. Carbon bisulphide was used at the rate of from l\ to 10 lbs. per 1,000 

 cu. ft. It penetrated and killed the boll weevils to a depth of 4j ft. in cottonseed. 



The slow rate of penetration indicated the futility of using carbon bisulphide 

 in this form. Experiments were, therefore, tried in applying carbon bisulphide in 

 an artificially volatilized form according to a method devised by W. E. Hinds. A 

 current of air was passed through liquid carbon bisulphide and the resulting vapor 

 was then driven by pressure through the cottonseed to the bottom of the containing 

 cylinder. Diffusion of the vapor under pressure was complete and rapid. In this 

 manner it was possible to kill boll weevils when the carbon bisulphide was used 

 at the rate of 8 lbs. per 1,000 cubic feet of space for a period of 40 hours. 



1915 - Hinds, W. E. Fumigation method for sacked cotton seed. J. Econ. Ent. 8(4):400- 

 402. 



The method of fumigation--carbon bisulphide against the cotton boll weevil-- 

 described in this paper was worked out in Alabama and is extensively used in the 

 treatment of cottonseed grown for planting purposes. With this method 4 men can 

 treat 600 or more sacks per day. The apparatus consists of a 3- in. air pump with 

 which the liquid and vapor can be forced through the seed. This is connected by 

 pressure tubing with one branch of an ordinary l/4-in. Y such as is used in 

 spraying work. On this branch is a cutoff and a regular spraying accessory; on 

 the other is a cutoff and an indicator to measure the amount required for each 

 sack. The Y is connected with tubing to penetrate the seed. The tubing is per- 

 forated for the last 18 inches to form a spray. About one ounce of carbon bisul- 

 phide is needed for a 3-bushel sack. 



1924 - Marcovitch, S. New insecticide for the Mexican bean beetle and other insects. 

 Tenn. Agr. Expt. Sta. B. 131, 19 p., 7 fig. Oct. Knoxville. 



Mustard gas (di-chloroethyl sulphide) and sodium fluosilicate nitrobenzene 

 were not outstanding in their effectiveness against A. grandis. 



116 



